cement floor with radiant heat with no drain or pitch in floor.

Q. Is there a way to install a floor drain without damage to radiant heat?

thanks steve

A. Without any underground drainage already in place it's impossible to install a floor drain without cutting a trench into the floor, digging out the dirt and installing drainage pipes for the floor drain.

In addition to that, the drainage pipes would have to exit from under the floor, through the foundation wall if you have one, to the outside and pitch away from the building so the water would exit from the drain pipes.